Force-feed lubricator.



Nb. 861,757. PATBNTED JULY so, 1907. J.' P. MocANNA.

FORGE FEED LUBRIGATOR.

APPLICATION FILED JAI. 5. 1905.

2 SHEETS-SHEET v1.

UNITED 'STATE-s JOHN r'. MCCANNA, or

`PIIX'IENT OFFICE'.

CHICAGO, ILLINOIS, SSIGNOR TO MCCORD & COMPANY, OF CHICAGO,

ILLINOIS, A CORPORATION OF'NEW lTERSEY.

.FORCE-FEED LU'BRICATOR.

To all whom 'it may concern.'

Be it known that I, JOHN F. MCCANNA, acitizen of the United States,residing at Chicago, in the county of Cook and-State of Illinois,haveinvented certain 1 This invention relates to improvementsinthatclass of force feed lubricators which are adapted to deliver oilfrom a 'reservoir to one or more bearings or other working parts locatedat different-points, such as the cylinders and bearings ofv automobilemotors, engines and other mechanisms. v

The invention consists of the combinations and arrangements of'partshereinafter particularly described andk then vpointed out in theappended claims.

In the accompanying drawings, which illustrate one embodiment of theinvention-Figure lis a longitudinal sectional view partially inelevation, showing the cover ent instance the reservoir is rectangularin form and h'as a removable cover 11 secured in position by screws 12or other means. l

One of thenovel features of the invention relates to v an improvedmechanism located Within the` reservoir and adapted to transmit motionfrom asuitable source bearing 14 provided therefor in' the'reserv'oir.AsV

of power, such as the apparatus being lubricated, to the vpumps whichare also located inthe reservoir. This driving mechanism vvc omprisesthe following construction. Ashaft 13 is suitably journaled on andpasses throughone of theWalls-of thel reservoin, entering a shown inFig. 2, one end ofthe shaft 13 extends outside of the reservoir and ,isdesigned to receive motion through the medium of any suitable mechanismfrom the source of power. The'shaft 13 is provided within the reservoirwith a worm 15 .which eng-ages'andldrives a worm gear v16 rotatably.mounted on a stub 'shaft 17 suitably securedfto one end of thereservoir. An eccentric 18 Iis also loosely journaled'on the stub shaft17 and is fixed1- I to the worm gear 16, as-by means ofa pin 19.`

A vrocker, shaft 20 is journaled in bearings 21 at the ends of thereservoirand one of these bearings, as shown in Fig. 1,'opens"throughthe end of the reservoir, such' opening being closed b3tal screw-plugl22. Motion is communicated to the rockershaft 20 the eccentric 18through the medium of a yoke 23 straddling the eccentric, as showninFig. 2,- and fixed, as by means o a t Specieationof Letters Patent.Application filed January 5,1905. Serial No. 239,591.

Patented July so, 1907.

set-screw 24, to the shaft 20.- The yoke 23 may be'of the invertedU-shape shown. The shaft 20 is de signed 'to communicate motion tothefplungerl of the pump locatedin the reservoir or where -a pluralityof' pumps are employed to the plungers of all osuch pumps. In thepresent .instance l have shown a plurality of sets of pumps each ofwhichsets comprises,'as shown in Fig. 2, a main pump 25 and an auxiliary pump26. Three of such sets of pumps are shown and located at "intervalsalong the shaft 20. The shaft 20 is pro-- vided at suitable points withrocker membersY comprisingopposite arms 27 and 28 each pair of which iscarried by a sleeve 29 connected, as by a set screw 30, tothe shaft.

As shown in Fig. 2 where one set of pumps is shown in section the arm 27projects into a slot vformed in an extension 31 ofthe piston 32 of themain `pump 25 while the opposite arm 28 entersa slot in an extension 33of the plunger 34 of the auxiliary pump 26'. By reason of theconstruction described, it is obvious that as the eccentric 18 isrotatedl the shaft 20 will be rocked and through the medium of the arms27 and 28 reciprocate the plungers ofthe main and auxiliary pumpssimultaneously and in opposite directions.

The driving mechanism, comprising the worm shaft and gear, eccentric andyoke, is within the reservoir and preferably' located at one endthereof, as shown in Fig.l

v 1. This arrangement greatly simplifies the mechanism for reciprocatingthe pump plungers and avoids the use of the usual extended eccentricshaft and coperating yokes associated with each pump, and at the sametime providesfor'the simultaneous operation of aplurality of pumps. v

In' the construction described, each main pump 25 is designed to drawthe oil from the reservoir and-deliver the same through a suitablesightfeed device .to the associated auxiliary pump 26 which dischargesthe oilv to. vthe part to be lubricated. To this end the body of the 43.'-A discharge passage #leads from the -pump 26 to the part to belubricatedelnd is provided with a valve 45 designed'to prevent 'the oilfrognflowingback 'into v the pump after havingbeen discharged.- Thevalves 36 and 43are' limitedin their-movement by suitable stops, such asscrews 46.

The sight feedjievies 40 fare. .carried by the coveri 1].I and are soarranged as tofbe disconnected from the ,inlet and outlet-.tubesSQ and,41 when the cover is re moved to permit of access to the .mechanismwithin the reservoir for purpose oi disassembling or repairs. Each oithese sight leed devices consists oi a. glass tube 47 having a cap 48and a base ring 49. The base i'rff has a vertical [lange 50 to receivethe lower end ol' glass and an internal shoulder 5l on which the glassrests. The base ring is also provided with an annular depending flange52 extending through a. suitable. aperture in the cover 11. A disk 53 islocated umleithe cover 11 and provided with an upstauding flange54'which receives the iiange 5'2 of the ring 49. As shown in Fig. 3, thedisk is provided with a pair of depending thimbles 55 one of which isthreaded at its upper end and receives the upper end of the tube 39Whilethe other thilnble receives the upper end oi the tube 41. A tube 5oscrews into the end of the threaded thimble 55 and has its upperend bentdownwardly so as to; aline with the upper ond ot' the tube 41. A screw57 passes through the cap 48 and engages a threaded ariierture in thebent end or' the tube 5G. Suitable packing rings 58 are provided ior thesight feed device to prevent leakage of the lubricant. By reason of theengagement of the threaded endl of the tube 5G with the disk 53 andthe'screw passing through the cap 48 and engaging the tube 56 each sightfeed is securely clamped to the cover; and owing to the telescopicconnection With the tubes 39 and 41,'provided by the thimbies 55, thesight feed devices' may be disconnected from the said tubes merely byremoving the cover. Each sight feed device is provided with a suitableair inlet which may pass, for example, through the cap 48, as at 59.Each sight feed device 40 serves to indicate the rate or" feed of theassociated set of pumps', the dropping oi `the oil from rho tube 56being visible through the glass of the sight feed. The operation of thedevice will be readily understood. 'Onthe suction stroke of the plunger32 of each main pump oil 'is drawn from the reservoir and. thendischarged by the plunger past the valves 38 to the tube 39. As'the oilrises in the tube 39 it passes into the tube 56 and drops from the bentend oi the latter into the tube 41. On the suction stroke of the plungerof the auxiliary pump 26 the oil in the tube 41 is sucked in past thevalve 43 and then discharged -by way of the passage 44 to the part to belubricated.

The pump 26 is preferably" of greater capacity than the pump 25, anchasthe former pump is able to take care of a greater supply ofoil than isdelivered thereto by the pump 25, on the suction stroke of the plungerof the auxiliary pump, air drawn in through the inlet 59 and enters withthe oil past the valve 43 to the pump 26. By reason of this charge ofair which is drawn in by the auxiliary pump and compressed ,against theresistanceof the gravity' valve 45, the oil is forced under the pressureof such compressed air to the bearing.

While the stroke of the plunger of the auxiliary pump 26 is constant,the stroke of the plunger 32 of the main pump is designed to be adjustedso that the quantity of oil fed to the auxiliary pump and consequentlyto the bearing may be varied as desired. For this purpose an adjustableabutment is located in the slot of the extension 31 oi each of the pumps25 in such position asto be engaged by thcarm 27 during its movement inone direction. This abutl i i I ment may take the form oi a shoulder o0lat thc lower end ol a stem ol in threaded engagement, with theextension 3l. and passing upwardly through a. suitable aperture in thecover Ill. y'turni g the siem ol the shoulder G0 may be suitablyadjusted to vary or eliminate lost motion between the arm 3l and thepump plunger', to vary the stroke oi vsuch plunger, 'l'he shoulder o0prevents the stem G1 from being disengaged from the plungerg'and as theupper end ol` the stern (il projects above the cover the reciproea tionof such stein will indicate the stroke ol' the pump.

As shown in Figs. 2 and 4, the bodies ol thev main and auxiliary pumpsare made ol' single castings connected as by a screw i innec ion o2 andeach set of pumps is removably se. ured to thefreservoir, as by a nut(i3. This is materal only in that it facilitates the assembling anddisassembling ol the parts. lf, for example, it is desired to remove thepumps from the reservoir, after the cover 1l is removed, it is onlynecessary to loosen the set-screws 24 and 30, to free the yoke 23 andarms 27 and 28 from the shalt 20, remove the screw plug 22 and Withdrawthe shalt 20. Then by removing the nuts 63 each set ol' pumps may bewithdrawn bodily from the reservoir together with the associatedactuating arms 27 and 28.

Having described my invention what I claim is- 1. In a device' of theclass described, the combination with areservoir and a pair ofcooperating pumps therein. a rocker member within the reservoir andprovided with opposite arms to reciprocate the pump "ilungersl a shaftto which the said member' is fixed and means for rocking the shaft.

2. In a device of the class described, the combination with a reservoirand a plurality of pairs ot' cooperating pumps therein the -iung'ers ofwhich are provided with slotted extensions. a rocker member associatedwith each pair of pumps and provided with' opposite arms entering,r theslots oi the plungers thereof, a shaft', on which the r" ker members areiixed, and an eccentric for rocking the said shaft.

t. In a device of the class described, the combination with a reservoirand a pair of cooperating pumps located therein, of a rocker shaft inthe reservoir and located between the pumps, opposite arms on the shaftto reciprocate the pump' plungers, and means to operate the shaft.

4. In a device ofrthe class described, the combination with a reservoirand :i pair ot' cooperating 'pumps located therein, or a rocker shaftbetween the pumps, opposite ins on the shaft to reciprocate the pumpplungers, an centric, means to operate the shaft, and means carried bythe plunger' of one'of the pumps to vary the stroke thereof.

In a device of the class described, the combination with a reservoir anda pair cooperating pumps located therein, of a rocker shaft lmtwecn thepumps, opposite arms on the shaft to reciprocate the plungers of themain and auxiliary pumps simultaneously in opposite direc'- tions. aneccentric means to operate he shaft, and a stem movable with thelplunger of the main pump and extending outside of the reservoirandproviding an adjustable abutment in the path of the arms cooperatingwith such pump.

o. In aA device of the class described, the combination with a reservoirand a plurality of sets of pumps therein, each set comprising a main andan auxiliary pump, a rocker shaft in the-reservoir between the main andthe auxiliary pumps, opposite arms on the shaft cooperating,r with thepumps. and-means to operate the shaft.

7. In n device of the class described, the combination with a reservoir,a removable cover secured only to the reservoir, and a -pumi located inIthe reservoir, of n sight feed device carried by the cover anddisconnected from its associated -pump by the removal ofthe cover.

X. In a device of the lass desc ned, the combination with a reservoir, aremovable cover therefor, and a pump 'located inthe reservoir, of asight feed device carried by the cover', and a tube leading from thepump and having telescopic connection with the sight feed device, thesight feed. device being disconnected' from the tube by the re- `movaiof the cover'.

sight feed device being disconnected from the tubes by thc` removal' ofthe cover.

10. In a device of theciass described, the combination with a reservoir,a removable cover therefor, a pair of cooperating pumps in thereservoir, means for reciprocating the pump piungers, of a sight feeddevice carried by the cover and through which the oii passes from onepump to the other, the said/sight feed device comprising a glass, a cap,a ring located under and engagingthe cover and having a pair ofdepending thimbles one set of which is threaded` a tube in the glassengaging the threaded thjmbie and having its upper end terminating inalinement with the other thimbie, a screw passing through the cap andengaging the upper end of the tube, and tubes associated with the pumpsand having telescopic connection with the Y11. 1n a device ot the classdescribed, the combination with a reservoir. a removable cover, Vand apump and driving means therefor locatedin the reservoir, of a sight feeddevice mounted on the cover, a. discharge tube for the pump looselyconnecting with the sight feed device, and means'for varying the strokeof the pump plunger passing freely through the cover, whereby when thecover is removed it is disengaged from the said means and the sightfeedl device is disconnected from the tube.

' 12. Ina device of the class described, the combination with areservoir, a removable. cover, and a pump and driving meansD thereforlocatedy in the reservoir, of a sight feed; device mounted on the cover,a discharge tube for the pump -having telescopic connection with thesight feed .device and` a stem connected with" the driving means` forvarying the stroke of the pump plunger and extending loosely through thecover, whereby when the cover is removed it is disengaged from the lsaidstem and the sight feed device 'is disconnected from the tube.

In testimony whereof i aix "my signature in. presence of two witnesses.

JOHN F.MCCANNA. Witnesses:

ARTHUR B. SmBoLn, ELIZABETH Momcron. v

